LTC3718_15 Datasheet, PDF (5/20 Pages) Linear Technology – Low Input Voltage DC/DC Controller for DDR/QDR Memory Termination

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3718
Frequency vs Input Voltage
450
400
LOAD = 10A
350
300
250
LOAD = 0A
200
150
100
50
V_OUT = 1.25V
FIGURE 1 CIRCUIT
0
1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
INPUT VOLTAGE (V)
3718 G07
Load-Step Transient
Load Regulation
0
–0.1
V_IN = 2.5V
V_OUT = 1.25V
–0.2
–0.3
–0.4
–0.5
FIGURE 1 CIRCUIT
–0.6
01234567
LOAD CURRENT (A)
8 9 10
3718 G08
Start-Up Response
V_OUT
200mV/DIV
I_L
5A/DIV
V_OUT
1V/DIV
I_L
2A/DIV
V_IN = 2.5V
20µs/DIV
V_OUT = 1.25V
LOAD = 500mA TO 10A STEP
FIGURE 1 CIRCUIT
3718 G10.eps
V_IN = 2.5V
V_OUT = 1.25V
4ms/DIV
LOAD = 0.2Ω
FIGURE 1 CIRCUIT
3718 G09.eps
On-Time vs V_ON Voltage
1000
I_ION = 30µA
800
600
400
200
0
0
1
2
V_ON VOLTAGE (V)
3
3718 G11
On-Time vs Temperature
300
I_ION = 30µA
250
200
150
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3718 G12
On-Time vs I_ON Current
10k
V_VON = 0V
1k
100
10
1
10
I_ON CURRENT (µA)
100
3718 G13
3718fa
5